// This plugin will turn all pixels black while maintaining their opacity.
// Copyright (C) 2009 Simon Brown
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using PaintDotNet;
using PaintDotNet.Effects;
using PaintDotNet.IndirectUI;
using PaintDotNet.PropertySystem;

namespace Silhoette
{
    public class Silhoette : Effect
    {
        public Silhoette() : base("Silhouette", null, SubmenuNames.Distort, false)
        {

        }

        public override void Render(EffectConfigToken parameters, RenderArgs dstArgs, RenderArgs srcArgs,
            Rectangle[] rois, int startIndex, int length)
        {
            for (int i = startIndex; i < length; i++)
            {
                Rectangle r = rois[i];

                for (int y = r.Top; y < r.Bottom; y++)
                {
                    for (int x = r.Left; x < r.Right; x++)
                    {
                        ColorBgra setColour = ColorBgra.Black;
                        setColour.A = srcArgs.Surface[x, y].A;
                        dstArgs.Surface[x, y] = setColour;
                    }
                }
            }
        }
    }
}